I can't help but wonder if this opens up a niche in the marketplace for a social networking site that actually does respect your privacy.
Personally, I would prefer a non-profit. I can't stand a private company like Facebook being the primary gateway to my social life. I would like to see multiple companies involved, but it would be a lot more difficult to get the network benefits of Facebook with multiple sites.
Is it time to think about it again, or is it just Slashdot and HN posters this time?
The solution is to not rely on "sites" -- to not give them the opportunity to act as corporations must.
My take on it is http://wingolog.org/archives/2010/04/10/towards-a-gnu-autono... , but there are other takes to be had.